Kelvin to Fahrenheit Converter

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Convert Kelvin to Fahrenheit using the chained formula F = (K − 273.15) × 9/5 + 32. Practical when scientific or engineering datasets use Kelvin but the report or end-user audience expects US-style Fahrenheit. Anchors: 0 K ≈ −459.67 °F (absolute zero), 273.15 K = 32 °F, 373.15 K = 212 °F. Browser-local conversion.

Kelvin (K)
Fahrenheit (°F)

Below absolute zero (impossible in nature).

Kelvin (K) → Fahrenheit (°F)

Quick reference table

Kelvin (K)Fahrenheit (°F)
0 K-459.67 °F
100 K-279.67 °F
200 K-99.67 °F
273.15 K32 °F
293.15 K68 °F
310.15 K98.6 °F
373.15 K212 °F

Glossary

Kelvin (K)

Kelvin is the SI base unit of thermodynamic temperature. The scale starts at absolute zero (0 K = −273.15 °C) — the lowest temperature physically possible, where particle motion stops. One Kelvin step equals one Celsius step, so 0 °C = 273.15 K and 100 °C = 373.15 K. Used in physics, chemistry and engineering wherever absolute temperatures matter.

Fahrenheit (°F)

Fahrenheit is the imperial temperature scale used in everyday life in the United States, where water freezes at 32 °F and boils at 212 °F. Introduced by Daniel Gabriel Fahrenheit in 1724, the scale was originally calibrated against a brine ice mixture and human body temperature. Convert with F = C × 9/5 + 32 or C = (F − 32) × 5/9.

Metric / SI temperature

In the metric system, temperature is reported in degrees Celsius (everyday) or Kelvin (scientific). The two scales share the same step size — one Kelvin equals one degree Celsius — and differ only by the constant 273.15: T(K) = T(°C) + 273.15. The Kelvin scale starts at absolute zero, while Celsius is anchored to the freezing point of water at standard pressure.

Imperial / US Customary temperature

In the United States, everyday temperature is reported in degrees Fahrenheit, where water freezes at 32 °F and boils at 212 °F. The Rankine scale (absolute, anchored at 0 °R = absolute zero with the Fahrenheit step) is occasionally used in US thermodynamics and aerospace engineering. The conversion between Celsius and Fahrenheit uses the affine formula F = C × 9/5 + 32.

Related tools

Fahrenheit to Kelvin
Convert °F to K — formula K = (F − 32) × 5/9 + 273.15
Kelvin to Celsius
Convert K to °C — formula C = K − 273.15
Celsius to Fahrenheit
Convert °C to °F — formula F = C × 9/5 + 32
Temperature Converter
Convert temperatures between Celsius, Fahrenheit, Kelvin and Rankine